Abstract: In order to improve the producing process of traditional converterconstruction steel, serials of technologies were implemented in the Second Steelmill Plant in Tangsteel. The efficiency of steelmaking was enhanced by controlling exactly the quality and quantity of burden. The whole continuous casting technology with equilibrium and stable production was improved. The technologies of ladle covering and increasing ladle turning over rate were utilized. The processes of production were optimized. And the efficiency of recycling secondary energy and processing energy consuming were raised to higher level. The recycling steam of converter and the recycling gas volume have escalated year by year. And the energy consumption, both of converter′s process and long product material have declined gradually. In 2013, the best ratios of energysaving were realized that the recycling steam of converter, the oxygenconsumption, the recycling gas volume, the converter’s
 process energy consumption, the continuous casting process energy consumption were 98.29 kg/t, 45.27 m³/t, 130.09 m³/t, －0.83GJ/t and 0.22GJ/t  
 respectively，as well as the steelmaking process reached －0.61 GJ/t. The highest entering temperature of billets to the heating furnace was 900 ℃. The heat burden ratio of the second rod line was 100  %. The rolling  process energy consumption was 0.70 GJ/t. The whole process energy consumption from steelmaking to
 rolling   reached to  0.09 GJ/t.

Key words: converter, bar and rod material, secondary energy, energy consumption of process, process optimization